Nucleosomes are best described as ____
a. prokaryotic DNA associated with nonhistone proteins
b. eukaryotic DNA associated with histone proteins
c. prokaryotic DNA associated with histone proteins
d. eukaryotic DNA associated with nonhistone proteins
e. associated histone and nonhistone proteins
ANSWER: b
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When considering nomenclature for scientific names, what is the difference between the two primates, Homo sapiens and Homo erectus?
A. One is a primate but the other is not. B. They are animals of a different kingdom. C. They are animals of a different order. D. They are animals of a different species. E. They are animals of a different genus.
In the experiments constructed by Pasteur to disprove spontaneous generation, swan-necked flasks were used. Why was this shape of flask used in this experiment?
A. The shape of the glass neck allowed the bacteria into the flask and then into the media, but air could not enter. B. Because the glass necks were stretched out, the heat used to sterilize the medium inside of the flask could not kill the bacteria in the neck. C. The glass necks needed to be open to the air, yet constructed so that bacteria would settle in the lowest part of the neck. D. These flask shapes were the easiest and cheapest to produce.
Certain orchids produce flowers and secrete scents that resemble female bees so that male bees will mount these
flowers and attempt to copulate with them. This bizarre occurrence is an example of: a. fertilization. b. coevolution. c. apomixis. d. self-pollination. e. asexual reproduction.
The evolutionary relationships between the eukaryotic supergroups are depicted in the diagram.Which of the following pairs of protists would be most closely related due to both of them possessing plastids?
A. archaeplastids & rhizaria B. archaeplastids & stramenopiles C. amoebozoans & excavates D. rhizaria & amoebozoans